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Please tell me about rrb ntpc

I have the doubt in very first video of triangles the CAT question at the end of the video.

What is the number of distinct quadratic equations having real roots that can be formed such that ax^2 + bx - 4 = 0 if a and b∈ {-5, -3, -1, 0, 1, 5}

A rectangular floor is fully covered with square tiles of identical size. The tiles on the edges are...

Read more at: https://cracku.in/30-a-rectangular-floor-is-fully-covered-with-square-t-x-cat-2005?utm_source=previouspapers&utm_campaign=cotentshare

10:101=11:?

a boat can travel 12.6 km upstream in 54 min. if the speed of the water current is 1/8 of the sleed of the boat in still water, how much distance in km the boat can travel downstream in 35 min?

(√5-2)²=?√80

I am cracku student. In rrb ntpc mock test:19, question no. :41, how to convert 44.44% to 4/9, 66.66% to 2/3, 8.33% to 1/12?

Can you please provide the solution of the previous year CGL papers

Are cracku mocks tougher than real CAT?