numerical symbolic operations Model Questions & Answers, Practice Test for ssc cgl tier 1

Question :26

If 9 * 2 * 5 = 23 and 1 * 4 * 8 = 29, then 1 * 6 * 3 = ?

Answer: (c)

9 * 2 * 5 is written as 529 and √529 = 23

1 * 4 * 8 is written as 841 and √ 841 = 29

So 1 * 6 * 3 is 361 hence √ 361 = 19

Question :27

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

Answer: (b)

Question :28

If 5 # 9 @ 7 = 52 and 3 @ 9 # 2 = – 89, then 7 # 6?

Answer: (c)

59 – 7 = 52

– 92 + 3 = – 89

76 – 9 = 67

Question :29

If 19 # 13 = 3; 25 # 3 = 11; 36 # 10 = 13; then what is the value of 7 # 3 = ?

Answer: (d)

(19 – 13)/2 = 3

(25 – 3)/2 = 11

(36 – 10)/2 = 13

Question :30

If 12 [20] 16 and 21 [35] 28, then what is value of A in 48 [80] A ?

Answer: (b)

Difference of non – bracketed digits multiplied by 5 is equal to bracket figure so 48 [80] A where A is 64

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