Direction (Q. 1-5) : What will come in place of question mark (?) in the following questions ?
36% of 75 + 32% of 85 = 40% of ?
40 x ?/100 = 36 x 75/100 + 32 x 85/100
= 27 + 27.2 = 54.2
∴ ? = 5420/40 = 135.5
17.5 of 3/7 of 64% of 280 = ?
? = 17.5 x 3 x 64 x 280/100 x 7 = 1344
3√1.3 x 3√1.69 x 2.197 ÷ 1.69 = ?
(1.3)1/3 x (1.3)2/3 x (1.3)3 ÷ (1.3)2
= (1.3)1/3+2/3+3-2 = (1.3)1+3-2 = (1.3)2 = 1.69
(126 ÷ 9) x 18.85 = ? ÷ 7.5
? = 14 x 18.85 x 7.5 = 1979.25
11025/? = ?/484
(?)2 = 11025 x 484 = 5336100
∴ ? = √5336100 = 2310
Direction (Q. 6-10) : What approximate value should come in place of question mark (?) in the following equations ?
(√12540 x 15.015), 1.978 = ?
? = (112 x 15) ÷ 2 = 840
(1581.78 ÷ 13.93) x 6.064 = ?
? = (1582 ÷ 14) x 6 = 113 x 6 = 678 = 680
1148% of 82 + 2125% of 58-8% of 1966 = ?
? = 1148 x 82/100 + 2125 x 58/100 - 8 x 1966/100
= 941.36 + 1232.5 - 157.28
= 2016.58 = 2020
77.987 x 16.06 x 12.489, 2.993 = ?
? = 78 x 16 x 12.5 / 5 = 26 x 16 x 12.5 = 5200
3√103820 x 3√274620 = ?
3√103820 = 47 and 3√274620 = 65
∴ ? = 47 x 65 = 3055
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