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Alternate Method :
Product =20 × 21 × 22 × ........ × 40 .
So we can find number of zeroes in 40! then we can subtract number of zeroes in 19! .
So 40/5 = 8 and 8/5 = 1 and adding all quoitent, number of zeroes = 8+1= 9;
19/5 = 3, so number of zeroes in 19! = 3.
So number of zeroes in the given product =20 × 21 × 22 × ........ × 40 = 9 - 3 = 6.
Find the wrong number in the given number series.
2, 3, 5, 7, 11, 13, 17, 20
6, 22, 76, 314, 1580, 9600
132, 148, 196, 340, 762, 2068
In each of the following giving number series, a wrong number is given. Find out the wrong number?
3023, 3132, 3246, 3356, 3471
275, 50, 165, 33, 99, 19.8, 59.4
169, 224, 293, 385, 497, 629
217 210 236 299 423 640
...54 54 108 39 144 28.8
Find the wrong number in the given number series.
3, 7, 22, 89, 445, 2675
