Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the one that is different.

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.

45 * 86 * 23 * 36 * 18 * 2021

Which of the following numbers will replace the question mark (?) in the given series?

2, 10, 40, 120, 240, ?

Three Statements are given followed by Three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements :

All stars are moons.

Some moons are suns.

All suns are satellites.

Conclusions :

I. Some satellites are moons.

II. Some satellites are stars.

III. Some moons are stars.