Question

there are 20 balls .the balls are numbered consecutively starting from anyone of the no. from 1 to 20 for any case the sum of the numbers on all the balls will be a/an
1.Odd no.
2. Even no.
3.prime no.
4.cannot say
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Answer 1

Answer:

2.Even no.

Step-by-step explanation:

We know that the balls are numbered 1 to 20

so therefore listing no. from 1 to 20

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.

we also know that sum of two odd no.s =even no.

                              sum of 3 odd no.=odd no.

             therefore  sum of 10 odd no.s =even no.

we also know that sum of any no. of even no.= even no.

therefore we can conclude that the sum=even no.

HOPE THIS HELPS YOU!!!!

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Answer 2

Answer:

Step-by-step explanation:

We can form an AP by doing it

As we have been said it increases consecutively

We get the AP as 1,2,3.....20.

So we have a= 1

d= 2-1 =1 [d = a2-a1]

l [ last term] = 20

Number of Terms n = 20

Applying the sum formula

Sn = n/2*(a+l)

Sn = 20/2*(1+20)

Sn = 10*21

Sn = 210

The number will be an even number

I hope it helps you