Problems And Solutions SEAMO PAPER A 2021

11. How many triangles are there in the figure below?

(A) 14
(B) 15
(C) 16
(D) 17
(E) 18

12. Susan adds up 8 of the following numbers. Given that the result is 400, which number did she leave out?

(A) 75
(B) 16
(C) 64
(D) 78
(E) 29

13. Today is Monday, the 9th of August. On which day of the week is the 9th of September?
(A) Tuesday
(B) Wednesday
(C) Thursday
(D) Friday
(E) Saturday

14. Lily wrote the following on a piece of paper

\(1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 … 7 8 7 9.\)

How many digits did she write altogether?
(A) 130
(B) 132
(C) 140
(D) 145
(E) 149

15. Find the missing number.

(A) 42
(B) 32
(C) 31
(D) 24
(E) 14

16. Perimeter is defined as the total length of the outline of a shape. For example, in the following figure,

The perimeter of the rectangle is
5 × 2 + 3 × 2 = 16 cm
Find the perimeter

(A) 21 cm
(B) 22 cm
(C) 24 cm
(D) 26 cm
(E) 28 cm

17. Find the sum of first 42 numbers in

\(2, 4, 6, 2, 4, 6, 2, 4, 6, …\)

(A) 168
(B) 164
(C) 162
(D) 160
(E) 172

18. What comes next?

(A) 11.45 a.m.
(B) 11.50 a.m.
(C) 10.50 a.m.
(D) 11.00 a.m.
(E) 10.55 a.m.

19. Mummy gave Mink some money. Mink spent $5.00 on a book. Her father gave her another $10.00. After paying $2.50 for a drink and $1.70 for some fries, she was left with $23.80. How much did Mummy give Mink at first?
(A) $21.80
(B) $22.00
(C) $22.50
(D) $22.80
(E) $23.00

20. Given that the digits R, I, C and E are all odd, what is the value of C?

(A) 1
(B) 3
(C) 5
(D) 7
(E) 9