Simplification and Approximation

A. 1/5
B. 4/5
C. 6/5
D. 8/5
Explanation:
(5/8 * 12/5 – 5/4)/(5/4) (3/2 -5/4)/(5/4) = 1/5

A. 182/3
B. 1831/54
C. 18
D. 201/2
Explanation:
12 + 16 – 10 = 18
and 13/18 + 11/27 – 5/9 = (39 + 22 – 30)/(9 * 2 * 3) = 31/54 The answer is 18 (31/54)

A. 3
B. 2
C. 4
D. 6
Explanation:
(5 * 5)/5 + 1/5 * 5 = 5 + 1 = 6

A. 12
B. 18
C. 20
D. 30
Explanation:
36 * 48 / 64 + 36/12 = 27 + 3 = 30

A. 4
B. 0.1
C. 1
D. 0.4
Explanation:
? % of 400 + 40% of 160 = 17% of 400
?/100 of 400 + 40/100 of 160 = 17/100 of 400
?(4) + 64 = 68 => ? = 1

A. 2080
B. 2480
C. 2260
D. 2380
Explanation:
Since, 40.1 = 40
52 * 40 = 2080

A. 44000
B. 24500
C. 34500
D. 26000
Explanation:
22004 – 29303 + 101299 – 59532
123303 – 888.35 = 34468 = 34500

A. 80000
B. 90000
C. 105000
D. 85000
Explanation:
9 * 3000 – 10.1 * 1100 + 8238 – 4302
31 * 3000 – 1010 * 11 + 8298 – 4302
93000 + 8298 – 11110 – 4302 = 101298 – 15412
= 85886 = 85000

A. 33500
B. 23500
C. 22500
D. 24500
Explanation:
421 * 0.9 + 130 * 101 + 10000
= 378.9 + 1313 + 10000 = 23508.9 = 23500

A. 10
B. 15
C. 7
D. 16
Explanation:
[8 + {(21 * √9/441 – 1 /5 of 60% – 1/5) * 625 + 7} ÷ 4] = ?
=[8 + [(2/5 * 3/5 – 1/5) * 625 + 7} ÷ 4] = ?
=[8 + {(6 – 5 /25) * 625 + 7} ÷ 4 = ?
=[8 + {32} ÷ 4] = ? = 16