Multiple Choice QuestionsWhile selling a watch, a shopkeeper gives a discount of 5%. If he gives a discount of 7%, he earns ₹ 15/- less as profit. The marked price of the watch is
₹ 697.5
₹ 712.5
₹ 750
None of these
What least value must be assigned to '*' so that the number 63576*2 is divisible by 8?
1
2
3
4
A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given and got the average as 50. The correct average of the number is:
48.2
48
48.1
48.1
Length of the sides of a triangle area a, b, c respectively. If a2 + b2 + c2 = ab + bc + ca, then the triangle is
Isosceles
Equilateral
Scalene
Right-angled
B.
Equilateral
a2 + b2 + c2 = ab + bc + ca
2a2 + 2b2 + 2c2 = 2ab + 2bc + 2ca
2a2 + 2b2 + 2c2 - 2ab - 2bc - 2ca = 0
a2 + b2 - 2ab + b2 + c2 - 2bc + c2 + a2 - 2ca = 0
(a - b)2 + (b - c)2 + (c - a)2 = 0
(a - b)2 = 0, a = b
(b - c)2 = 0, b = c
(c - a)2 = 0, c = a
∴ a = b = c
∴ Triangle will be equilateral
The area of the circle with radius Y is W. The difference between the areas of the bigger circle (with radius Y) and that of the smaller circle (with radius X) is W'. So X/Y is equal to:
A right circular conical structure stands on a circular base of 21 m diameter and is 14 m in height. The total cost of colour washing for its curved surface at 6 per sq m is (Take 
)
4365
4465
3465
3365
and x, y are positive integers, then the value of 
Switch
then 
is equal to
