# Mental Arithmetic, Basic and General Mathematics Practice Questions Test

#### Question No 1

What is 15 multiplied by 11?

Solution!
15 * 11 = 165.

#### Question No 2

A/B = 2/3. If value of A is 8 What is the value of B?

Solution!
8/B = 2/3!2B = 24!B = 12! !*In short-cut way We can find 2 is multiplied by 4 to get 8 so if we multiply 3 with 4 we get 12 which is the value b B when value of A is 8..

#### Question No 3

What is average of 12 , 15 and 18?

Solution!
(12+15+18)/3 = 45/3 = 15.

Solution!
1.99 * 3 = $5.97. #### Question No 69 A cycle costs$170.Jane saves $50 each week.How many weeks will it be before she can buy it? #### Select the correct answer Solution! 170 / 50 = 3.4!But 3.4 is not in options so nearest Option is 4. #### Question No 70 A bus covers a distance of 60 Km in 1.5 hr. How far it would travel in half hour. #### Select the correct answer Solution! Distance covered in 1.5 hr = 60! !Distance covered in 1 hr = 60/1.5 = 40 Km! !Distance Covered in 0.5 hr = 40 * 0.5 = 20. #### Question No 71 If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, what is the average marks of all the students? #### Select the correct answer Solution! Weighted average will be more close to the average of that batch which has maximum number of students so aanswer is 54.68! !If you want to calculate it by formula then solution is! !(55*50 + 60*55 + 45*60)/(55 + 60 + 45) = 54.68. #### Question No 72 7/21 in lowest term is? #### Select the correct answer Solution! 7/21 = 1/3. #### Question No 73 15 men were hired to plough a piece of land in 10 days. How many more men will be required to do the same job in 3 days? #### Select the correct answer Solution! x/15 = 10/3! !x = (10/3)*15! x = 50.! !So more number of men required = 50-15 = 35. #### Question No 74 If n is even, Which of the following cannot be odd? (1) n+3 (2) 3n (3) n^2 - 1 #### Select the correct answer Solution! 3n and n^2 - 1 will always odd so in case of 3n answers will be even.. #### Question No 75 Ahmad reads 24 pages of a book in 15 minutes. The rate of pages read per minute by him will be #### Select the correct answer Solution! 24/15 = 8/5!8/5 = 1.6. #### Question No 76 If a amount of$120 is divided among A and B in the ratio 1/2 then A will get?

Solution!
A will get half amount which B got.So if A's amount is 40, B's amount will be 80 (double of A's amount)..

378 * ? = 252

Solution!
252 / 378 = 2/3.

#### Question No 78

30 men can complete a work in 30 days how long will 20 men take to complete the same amount of work?

Solution!
x/30 = 30/20! !x = (30/20)*30 = 45.

#### Question No 79

Multiply 6.85 by 7.

Solution!
6.85 * 7 = 47.95.

#### Question No 80

The average of 20 numbers is 0, How many of them may be greater than zero,at the most?

Solution!
Maximum Numbers that can be greater than 0 to maintain total average greater than 0 are 19..

#### Question No 81

What is the sum of first 5 positive even integers?

Solution!
2+4+6+8+10 = 30.

#### Question No 82

The side of a square is 2. What is the area of the square?

Solution!
Area of square is!2 * (any side)!= 2 * (2) = 4 square units.

#### Question No 83

What is smallest integer greater than 1 that leaves remainder 1 when it is divided by 5 or 8?

Solution!
40 is the least common multiple of 5 and 8 so 41 will be the smalles integer that leaves 1 when it is divided by 5 or 8..

#### Question No 84

If the sum of three consecutive whole numbers is 15, what is the largest of the three numbers?

Solution!
6+5+4 = 15.

#### Question No 85

What is the largest 4 digit number exactly divisible by 88?

Solution!
No answer description available for this question..

#### Question No 86

64% of the children in school are girls.What percentage are boys?

Solution!
100 - 64 = 36%.

#### Question No 87

Which of the following is a prime number?

Solution!
A prime number is the number which is divisible by 1 and by itself only! !and 2 is the only one even number which is prime..

#### Question No 88

Add 5683 to 1729 and divide by 2.

Solution!
5683 + 1729 = 7412! !7412 / 2 = 3706.

#### Question No 89

What is 8/40 expressed as a decimal?

Solution!
Simple way is! !(8/4) * (1/10) = 2 * 0.1 = 0.2.

#### Question No 90

Which one of the following is a prime number ?

Solution!
307 is only number which is divisible by 1 and by itself only..

#### Question No 91

2664/12/6=?

Solution!
(2664/12) * (1/6) = 37.

#### Question No 92

If the number 481z673 is completely divisible by 9, what is the the smallest whole number in place of z?

Solution!
Select answer from options! !4817673 is completely devisible by 9..

#### Question No 93

What is 5/8 of 240?

Solution!
(5/8) * 240 = 150.

#### Question No 94

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg.Find the average weights of all the boys in the class.

Solution!
! !In this question weighted average is calculated rather than simple average! !(50.25*16 + 45.15*8)/(16+8) = 48.55.

#### Question No 95

If average of 8, 7, 12, 15 and x is 11 what is x?

Solution!
(8+7+12+15+x)/5 = 11! !42+x = 55! !x = 55-42!=13.

#### Question No 96

A number is thrift if it is a multiple of 2 or 3. How many thrift numbers are there between 0 and 15?

Solution!
Thrift numbers between 0 and 15 are following! !2,3,4,6,8,9,10,12,14.

#### Question No 97

100/101 = ?

Solution!
100/101 = 0.990099.

#### Question No 98

What is 55% of 320?

Solution!
55 * (320 / 100) = 176! !Quick way to find answer from options is! !50% of 320 is 160 so answer should be greater than 160!Only one option is greater than 160 which is 176..

#### Question No 99

John can read 8 pages of a book in 7 minutes, how long will he take to read 40 pages?

Solution!
40/8 = 5! !As pages are increased 5 times. So minutes will also increase 5 time.! !7 * 5 = 35.

#### Question No 100

49/10 + 49/10 + 49/10 = ?