587 * 999 = ?

Answer: Option C

Explanation:

(1056 / 23) gives remainder 21

21 + 2 = 23, So we need to add 2

Answer: Option A

Explanation:

Trick: Number is divisible by 9, if sum of all digits is divisible by 9, so (2+2+3+*+4+3+1) = 15+* should be divisible by 9,
15+3 will be divisible by 9,
so that least number is 3.

Answer: Option C

Explanation:

3*6*9 = 162

Answer: Option B

Explanation:

A prime number is a natural number greater than 1 which has no positive divisors other than 1 or itself.
So from above options 2 is that number

Answer: Option D

Explanation:

$$\begin{aligned} (a + b)^{2} = (a^2 + b^2 + 2ab) \end{aligned}$$
$$\begin{aligned} 1307^{2} = (1300 + 7)^2 = (1690000 + 49 + 18200) \end{aligned}$$