exam Maths Puzzle Numerical Ability

Q1. In how many ways 5 girls & 5 boys can be arranged if at least 3 girls sit together?

Q2. In how many ways 7 girls & 5 boys can be arranged if at least 2 girls sit together?

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exam Other Question

Find the perimeter and area of a triangle measuring 5x3x4

I think the perimeter = 5x3x4=60
I think the area= 5+3+4=12 In triangle PQR, QS is perpendicular to PR, PQ is congruent to RQ, angle 1 equals 4x, angle 2 equals 2x+18 a.prove triangle PQS is congruent to traingle RQS
b.Find the value of x