What approximate value will come in place of the question mark (?) in the following question mark (?) in the following questions?
1. (32.51)2 – (17.45)2 = ?
(a) 750
(b) 850
(c) 680
(d) 820
Show Answer
Answer : (a) 750
Explanation:
? = (32.51)2 – (17.45)2
= ? = (32.51 + 17.45)
(32.51 – 17.45)
= ? = 49.96 * 15.06
= ? = 50 * 15 = 750
2.88.25% of 450 = ? % of 530
(a) 70
(b) 68
(c) 75
(d) 80
Show Answer
Answer : (c) 75
Explanation: 450 * 88.25/100 = 530 * ?/100
= ? * 530 = 450 * 88.25
= ? = 450 * 88.25/530
= ? = 74.93 = 75
3. Square root of 898 * (12.005)2 + ? = 5000
(a) 680
(b) 720
(c) 750
(d) 620
Show Answer
Answer : (a) 680
Explanation:
Square root of 898 * (12.005)2 + ? = 5000
= square root of 900 * (12)2 + ? = 5000
[898 = 900; 12.005 = 12]
= 30 * 144 + ? = 5000
= ? + 4320 = 5000
? = 5000 – 4320 = 680
4. 3745/24.05 * 17.98 = ?
(a) 2860
(b) 2800
(c) 2760
(d) 2720
Show Answer
Answer : (b) 2800
Explanation:
? = 3745/24 * 18
= ? = 156.04 * 18
= ? = 2808.72
= ? = 2800
5. 117.95 * 8.017 * 4.98 = ?
(a) 4670
(b) 4780
(c) 4840
(d) 4720
Show Answer
Answer : (d) 4720
What approximate value will come in place of the questions -mark (?) in following equation?
6. 2/7 of 14/19 of 305 = ?
(a) 75
(b) 64
(c) 56
(d) 78
Show Answer
Answer : (b) 64
Explanation:
? = 2/7 of 14/19 of 305
= 1220/19 = 64.21
= 64
7. 384.996 * 15 * 001 + 44 * 99 = ?
(a) 5280
(b) 5420
(c) 5820
(4) 5480
Show Answer
Answer : (c) 5820
Explanation:
? = 384.996 * 15.001 + 44.99
= 385 * 15 + 45
= 5775 + 45 = 5820
8. (10 * 998)2 * (4 * 001)3 = ?
(a) 7700
(b) 7640
(c) 7600
(d) 7740
Show Answer
Answer : (d) 7740
Explanation:
? = (10.998)2 * (4.001)3
= (11)2 * (4)3
= 121 * 64 = 7744
= 7740
9. (10 * 998)2 * square root of 725 = ?
(a) 3560
(b) 4120
(c) 3720
(d) 3880
Show Answer
Answer : (d) 3880
Explanation:
(d) ? = (12.001)2 * square root of 725
= (12)2 * 27 = 3888
= 3880
10. 4, 5, 13, 40, 104, ?
(a) 229
(b) 308
(c) 315
(d) 241
Show Answer
Answer : (a) 229
Explanation:
(0)2 + 4 = 4
= (0 + 1)2 + 4 = 5
= (1 + 2)2 + 4 = 13
= (3 + 3)2 + 4 = 40
= (6 + 4)2 + 4 = 104
? = (10 + 5)2 + 4
= 225 + 4 = 229