Direction: What will come in place of the question mark :

1. 124, 228, 436, ?, 1684, 3348
1) 944
2) 852
3) 872
4) 444
5) None of these

2. 1, 3, 24, 360, 8640, ?, 14515200
1) 282400
2) 292400
3) 302400
4) 25426
5) None of these

3. 10, 17, 48, 165, ?, 3475, 20892
1) 688
2) 712
3) 848
4) 918
5) None of these

4. 15, 17, 38, 120, 488, ?, 14712
1) 2450
2) 2650
3) 2850
4) 2950
5) None of these

5. 1, 6, 19, ?, 85, 146, 231
1) 46
2) 44
3) 48
4) 65
5) None of these

6. A hemisphere a cylinder and a cone stand on the same base and have the same height. Then find the ratio of their volumes respectively ?
1) 1 : 2 : 3
2) 3 : 2 : 1
3) 2 : 3 : 1
4) 2 : 1 : 3
5) None of these

7. 1/3rd of a tank is filled with milk. After taking out 8 litres of milk 1/4th of the is still filled. Find the capacity of the tank ? (in litre)
1) 84 litre
2) 96 litre
3) 156 litre
4) 80 litre
5) None of these

8. If the ratio of heights and radius of two cones are respectively 2 : 7 and 4 : 3, the ratio of their volume is ?
1) 35 : 63
2) 32 : 63
3) 63 : 32
4) 3 : 49
5) None of these

9. If 27 is subtracted from a number then it is reduced to 40% of its original. The 1/3rd of the number is ?
1) 15
2) 30
3) 60
4) 75
5) None of these

10. In a mixture of 90 litres, the ratio of milk and water is 4 : 2. How much water should be added to the mixture so that the ratio of milk and water becomes 6 : 4 ?
1) 50
2) 10
3) 40
4) 20
5) None of these

1. 2;
× 2 - 20, ×2 - 20, × 2 - 20, ------------------

2. 3;
×(22 - 1), × (32 - 1), (42 - 1), ×(52 -1), ×(62 -1) ----------

3. 1;
×1 + 7, ×2 + 14, × 3 + 21, ×4 + 28 ----------------

4. 1;
× 1 + 2, ×2+ 4 , ×3 + 6, × 4 + 8, × 5 + 10 ------------

5. 2

6 .3
2/3 * 22/7 * r^3 : 22/7 r^2 h : 1/3 * 22/7 * r^2 h

Since r = h
2 : 3 : 1

7. 2
1/3x - 1/4x = 8
x = 96litres

8. 2
2 * 4^2 : 7 * 3^2
32:63

9. 1
x - 27 = 2/5x
3x = 27 * 5
x = 15

10. 2
Let x litres water us added
60/(30 + x) = 6/4 = 3/2
120 = 90 + 3x
x = 30/3 = 10 litres