Book Maths Puzzle Numerical Ability

how many figures are required to number a book containing 150 pages??

Read Solution (Total 1)

1 to 9 =9*1=9
10 to 99=90*2=180
100 to 150 =51*3=153

total=9+180+153=342
10 years agoHelpfull: Yes(1) No(0)

Book Other Question

One side of a rectangle lies along the line 4x+7y+5=0.
Two of its vertices are (-3,1) and (1,1). Which of the foolowing is not an equation of the other three straight lines?
a)14x-8y=6
b)7x-4y=-25
c)4x+7y=11
d)14x-8y=20 In a Shirt factory, there are three processes named A,B, and C.They manufactures 25%,35%,40% of production respectively.of these 3%,4%,2% are defective.What is the probability the randomly selected shirt is of the defective one produced by process C?