Olympiad Test: Series And Pattern - 1 - Class 4 MCQ

Rule of adding 2 to each number is followed. 3 cakes on Monday then 3+2=5 cakes on Tuesday then 5 + 2 = 7 cakes on Wednesday, then 7+2=9 cakes on Thursday, then 9 + 2 = 11 on Friday, at last they made 11 + 2 = 13 on Saturday.

Every term of the series starts with next fourth alphabet.

First term ends at F and F+4=J.

Second term ends at L, so third term will start with fourth alphabet after L i.e P.

Third term ends at R.

Thus, fourth term will start with V.

So fourth term becomes VWX.

RQ, NM, and JI all are written in reverse order, while PQ is not.

Rule of adding 6 to each number is followed.

• Divisibility by 3: To determine which number is different, we can check if each number is divisible by 3. A number is divisible by 3 if the sum of its digits is divisible by 3.

  • 234: 2 + 3 + 4 = 9 (divisible by 3)
  • 396: 3 + 9 + 6 = 18 (divisible by 3)
  • 456: 4 + 5 + 6 = 15 (divisible by 3)
  • 656: 6 + 5 + 6 = 17 (not divisible by 3)

• Conclusion: Since 234, 396, and 456 are all divisible by 3, while 656 is not, d) 656 is the one that is different from the others.

So D is correct option.

Options A, B, and C follow the same pattern while D is different.