IBM Number Series 1 Quiz-1

8+16+3=27
4+8+7=19
2+0+7=9
ans = 9

552=5+5+2=12,9+9+5=23,1+5+2=8,6+6+1=13,5+2+0=7

101 , 102 (100 + last digit of previous number * 2) , 106(100 + last digit of previous number * 3),124 (100 + last digit of previous number * 4),220 (100 + last digit of previous number *5).....

make this series into 3 parts
-3, -2, -1, 0(ans)
6, 4, 2, 0
1, -1, -3, -5
ans 0

0.0018/0.03= 0.06
0.00108/0.0018= 0.6
0.00648/0.00108=6
0.3888/0.00648=60
x/0.3888 = 600
so x = 600*0.3888 = 233.28
ans 233.28

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for 0,1,2,0.5 - -> 0+1 = 1, 1/2 = 0.5
for 2,3,5,1 ---> 2+3 = 5, 5/5 = 1
for 2,0,2,1 ---> 4+2 = 6, 6/3 =2
ans 2

two series present
one is 5/7,9/11, 13/15, 17/19, x/(x+2)
it looks like 5,7,9,11,13,15,17,19,so numerator is 21 and then denominator is 23
ans is 21/23

correct question is 9/8, 4/3, 17/8 ,3 1/3, 7/3, 42/8, 3 1/3, 7 1/4 ,1 3/3 , 7/2, 5 1/3, ?
ans:-
divide into 2 parts
9/8,17/8,7/3,10/3,13/3,16/3
4/3,10/3,42/8,29/4,7/2,?
9/8+1=17/8
7/3+1=10/3
13/3+1=16/3
in the same way 2nd pattern is
4/3+2=10/3
42/8+2=29/4
7/2+2=11/2(ans)

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20 is constant. so we have 18,22,28,?
The difference is 4 between 18,22 and 6 22,28.
so the next will be 28+8=36

Explanation :

1.4+1=2.4
2.4*1=2.4
2.4+2=4.4
4.4*2=8.8
8.8+3=11.8
11.8*3=35.4
35.4+4=39.4
39.4*4=157.6
ans. 157.6

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30.5,31 and 67.2,67....183.7=184

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37 reverse 73 then digit square 3^2 and 7^2
37 rev 73 3^2, 7^2
58 rev 85 5^2, 8^2
29 rev 92 2^2(ans)

explanation
(5-2), 5, 2, (5+2)/2, (5+2), (6-2), 6, 3, (6+3)/2, 6+3,(x-2)=1.5
so ans = 1.5+2 = 3.5
ans 3.5
15.) 2,1,2,3,2,9,9,0,1,1,9
2,1,2^1,3,2,3^2,9,0,9^0,1,9,1^9

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number of digit in 10^n is n+1.so no of digits in 10^10^10=10^100 is 100+1 =101.answer is 101s.

25 - 13 = 12
39 - 17 = 22
51 - 19 = 32
57 - 15 = 42
45 - x = 52