1000+ Aptitude Questions and Answers for Freshers - 1

Ans: A

The smallest 4 digit number is 1000.

This when divided by leaves 6 as remainder.

∴ 1001 is the smallest 4 digit number exactly divisible by 7.

Ans: D

21 = 3 x 7 is not a prime number because 21 is a composite number.

Ans: B

-95 ÷ 19 = $${-95} / {19}$$ = -5.

Ans: B

(65)² - (55)² = (65 + 55) (65 – 55) = (120 x 10) = 1200.

Ans: B

Unit digit of (67)²⁵ = Unit digit of 7²⁵.

Unit digit of 7⁴ is 1 and so the unit digit of (7⁴)⁶ is 1.

∴ Unit digit of 7²⁵ = (1 × 7) = 7.