Explanation

Solutions

Explanation

Sales tax of 5% on the purchase of the item = 5% of 250

Sales tax of 4% on the purchase of the item = 4% of 250

Therefore, the difference in the item's purchase will be,

= 5% of 250 - 4% of 250

= 5/ 100 x 250 - 4 / 100 x 250 

= 12.5 - 10

= 2.5

Explanation

Here we need sum of 2,4,6,……..,98(between 1 and 100)

Now here First term = 2 difference= 2, n = 50

So now sum of these terms = n/2(2a+(n-1)d)

= 49/2(2*2+(50–1)2)

= 49/2(4+(49)*2)

= 49/2(4+98)

= 49/2(102)

= 49*51

=2550

Explanation

2^2-(2) +(-2) + (-2)^2 = ?

= 4 - 2 - 2 +(-4) 

= 4 - 2 - 2 - 4 

= - 2 - 2

= - 4

Explanation

If 3/17 of a number is 51,

34 is 2/17 of that number

Explanation

If 25% of proposals are rejected for a project,

3:1 is the ratio of the number of proposals accepted to the number of proposals rejected

Explanation

(56)^2 - (37)^2 / 56-37

3136 - 1369 / 19

1767

93