How to ask for Mobile Number ? | CBSE Cass 7 | Radhika Mam #shorts

Ranika wanted her friend Radhika’s mobile number. But Radhika played a trick. She gave her the number as 9 X Y Z P 1 Q 2 R 3 and told her to decode it with the help of following equations : (a) (3X-8)/(2X)=1 (b) (6Y-7)/(3Y+9)=1/3 (c ) (Z^(2)-9)/(5+Z^(2))=(-5)/9 (d) P+3/10P=13/10 (e) 4( Q+4)=5(Q+2) (f) 3(R+10) + 200 = 236

A mobile number consists of ten digits. The first four digits of the number are 9, 9, 8 and 7. The last three digits are 3, 5 and 5. The remaining digits are distinct and make the mobile number, the greatest possible number. What are these digits?

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A student was asked to divide a number by 3. But instead of dividing it he multiplied it by 3 and got 29.7. What was the correct answer ?

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One junior students is asked to divide half a number by 6 and the other half by 4 and then add the quantities. Instead of doing so, the student divides the given number by 5. If the answer is 4 short of the correct answer, then the number is (a) 320 (b) 360 (c) 400 (d) 480