Question

Write the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 in this order and insert ‘+ ‘or ‘–' between them to get the result (a) 5 (b) –3(D)

Answer 1

5

Explanation:

we can write the digits in following form

0+1-2+3-4+5-6+7-8+9

= -1 - 1 -1 -1 +9

=-2-2+9

= -4+9

= 5