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how do i solve parajumbles

the contents of two vessels containing water and milk are in the ratio 1:2 and 2:5 are mixed in the ratio 1:4. the resulting mixture will have water and milk in the ratio. can any one help me

Two circles with centres P and Q cut each other at two distinct points A and B. The circles have the same radii and neither P nor Q falls within the intersection of the circles. What is the smallest range that includes all possible values of the angle AQP in degrees?

in examination, 30% of the total students failed in Hindi,45%failed in english and 20% failed in both the subjects find the percentage of those who passed in both the subjects

how do i solve para jumbles

A sequence of numbers is written in the following fashion: 1, 7, 1, 1, 7, 7, 1, 1, 1, 7, 7, 7, ... till ‘n’ terms. The sum of first 5001 terms of the given sequence is

APPROACH PLEASE

a.the sum of products of ten numbers (both positive &negative; signs)1,2,3,...5 taking two at a time is ?
B.If a ,b ,c are real numbers ,then minimum value of ab+bc+ca?
C. If |x| -|y| =13 then which of following can't be value of x-y? options: -19 / -9/-17/none of these

Find the number of natural number solutions to the system of equations : a+b+c+d+e=20; a+b=4 and a+e =5

For how many integral values of x will |(x-1!)| + |(x-2!)| + |(x-3!)| + |(x-4!)| asuume a minimum value?

Is there a general method to solve problems based on finding number of integral solutions, or do should we try out whatever works each time? For eg. What is the number of positive integral solutions for x^2 + 3y^2 = z^2