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(a+b-c+d)^2 - (a-b+c-d)^2 ?

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In today's Daily Target regarding the number of integral points bounded by two curves/figures, shouldn't the points on the |x| + |y| = 8 NOT considered because the question mentions "INSIDE the curve"?

there are two qualities of milk - amul and sudha having different prices per litres, their volumes being 130 litres and 180 litres respectively . after equal amounts of milk removed from both , the milk removed from amul was added to sudha and vice versa , the resulting two types of milk now have the same price , find the amount of milk drawn out from the each type of milk please help !,,,

Fathometer is used to measure This question is required. *

Find the next term-
5, 14, 33, 98, ?
A) 222
B) 224
C) 226
D) 228

Sides of regular octagon is extended to form a star. Find the measurement of interior angle at each point of the star

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I'm from batch7

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how can I change the language of mock test?