### General Aptitude - Numberical Ability - Number System

#### Question - 1

There are four prime numbers written in ascending order. The product of the first  three is 1001 and that of the last three is 2431. Find the first prime number

• A 7
• B 11
• C 3
• D 5

#### Question - 2

What is the remainder when ${ 7 }5^{ 3 }$ is divided by 4?

• A 1
• B 1
• C 3
• D 2

#### Question - 3

A man is typing numbers 5 to 700 on his computer. How many times does he press the key of his computer?

• A 988
• B 1988
• C 1888
• D 1990

#### Question - 4

What least number must to be added to 15763 so that it is exactly divisible by 18?

• A 5
• B 18
• C 12
• D 13

#### Question - 5

What least number must be subtracted from 178669 ao that it is exactly divisible by 36?

• A 18
• B 1
• C 36
• D 5

#### Question - 6

Find the numbers of prime factors contained in the product of ${ 23 }^{ 11 }\times { 7 }^{ 4 }\times { 3 }^{ 5 }$

• A 25
• B 17
• C 30
• D 20

#### Question - 7

Two numbers when divided by a certain divisor give remainders 350and 20 respectively and when their sum is divided by the same divisor, the remainder is 1.5 find the divisor.

• A 30
• B 40
• C 35
• D 45

#### Question - 8

A certain number when successively dividedby 5 and 7 leaves the remainder, if the same number is divided by 35?

• A 21
• B 23
• C 24
• D 29

#### Question - 9

What is the difference between the greatest and th smallest five digit numbers formed using the digits 7,0,3,4 and 2 without repeating the digits?

• A 65672
• B 53978
• C 54672
• D 65978

#### Question - 10

A boy had to do a multiplication.instead of taking 35 as one of the multipliers, he took 53. As a result the product went up by 540.What is the new product?

• A 1590
• B 1450
• C 1550
• D 1420
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