Simplification For Bank and Insurance Exams like SBI Clerk Pre, IBPS, LIC and RBI Assistant 2020

Direction : Read the following questions carefully and choose the right answer.
1
What should come in place of question mark (?) in the following question?

(474552)1/3 – (6084)1/2 + 68 – 7.8 = ?
» Explain it
B
? = (474552)1/3 – (6084)1/2 + 68 – 7.8

? = (783)1/3 – (782)1/2 + 68 – 7.8

= 78 – 78 + 68 – 7.8 = 60.2

Hence, option B is correct.



2
What should come in place of question mark (?) in the following question?

27 13  + 23 14  + 28 12  – 17 21  + 0.85 – 0.37 = ?
30 25 15 45
» Explain it
A
? = 27 13  + 23 14  + 28 12  – 17 21  + 0.85 – 0.37
30 25 15 45

? = (27 + 23 + 28 – 17) +  ( 13  +  14  +  12  –  21 )  + 0.48
30 25 15 45

? = 61 +  ( 195 + 252 + 360 – 210 )  +  48
450 100

= 61 +  597  +  48  = 61 +  1194 + 432
450 100 900

= 61 +  1626  = (61 + 1) +  726
900 900

= 62 +  121  = 62 121
150 150

Hence, option A is correct.

3
What should come in place of question mark (?) in the following question?


294  +  726  +  1176  +  486  –  600  = ?
» Explain it
C
? =  294  +  726  +  1176  +  486  –  600  

? =  6 × 49  +  6 × 121  +  6 × 196  +  6 × 81  –  6 × 100

? = 7 6  + 11 6  +14 6  + 9 6  – 10 6

6 (7 + 11 + 14 + 9 – 10) = 31 6

Hence, option C is correct.

4
What should come in place of question mark (?) in the following question?


(531441)1/3 ÷ 9 × 
4096
 + 
6561
 – 16 = ?
8 9
» Explain it
B
? = (531441)1/3 ÷ 9 × 
4096
 + 
6561
 – 16
8 9

= 81 ÷ 9 ×  64  +  81  – 16
8 9

= 9 × 8 + 9 – 16 = 65

Hence, option B is correct.

 
5
What should come in place of question mark (?) in the following question?

164.2 × 2562.1 × 142 × 1963.2 = ?
» Explain it
A
? = 164.2 × 2562.1 × 142 × 1963.2

= 164.2 × 16(2×2.1) × 142 × 14(2×3.2)

= 164.2+4.2 × 142+6.4

= 168.4 × 148.4 = (16 × 14)8.4 = 2248.4

Hence, option A is correct.