1. The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles. Solution: Circumference of first circle = 2 πr Read More …

# Month: July 2017

## Questions on Time and Work

1. A alone can do a piece of work in 6 days and B alone can do it in 12 days. In how many days will A and B together do the same work? Solution: Let total work = 12 Read More …

## Questions on triangle (Pythagoras theorem)

1. ABC is an isosceles triangle in which angle B = angle C and angle A is greater than the angle B. Find the measure of angle A. Solution: An isosceles triangle has two angles equal in size. In this Read More …

## NCERT QUESTIONS ON TRIANGLE

1. Using basic proportionality theorem, prove that a line drawn through the mid point of one side of a triangle parallel to another side bisects the third side. Proof: Let D is the mid point of AB and DE is Read More …

## Questions on circles

1. From a point Q, the length of the tangent to a circle is 24 cm and distance of Q from the center is 25 cm. The radius of the circle is a) 7 cm b) 12 cm c) 15 Read More …

## Data Sufficiency

Data sufficiency In data sufficiency, one question is given and two or three statements are also given We have to find that whether statement 1, statement 2 or statement 3 is sufficient to give an answer or all together Read More …

## Data interpretation

Data Interpretation The data can be represented in the following ways : Numerical data tables Bar diagrams Line graphs Pie diagrams Numerical data tables Simple tables A simple table gives information about only one single characteristic of the Read More …

## HCF and LCM

LCM and HCF HCF (highest common factor): HCF of two or more numbers x1, x2, …… ,xn is the greatest number which will completely divide the numbers x1, x2, …… ,xn. LCM (least common multiple): LCM of two or more Read More …

## Simplification and Approximate value

Simplification and Approximate value BODMAS – ( bracket of division multiplication addition and subtraction) Step 1 – First of all solve brackets Step 2 – After that solve powers and surds ( squares , cubes , square root , cube Read More …

## Number Series

Number series In number series, a series proceed with a fix pattern and we have to recognize that pattern. Some commonly used pattern of number series 1. Squares: a = y 2, 6, 30, 260, 3130, ? + 1 Read More …