Question

Badri, who collects stamps, gave half the number that he had to Varun, who had none. Varun gave half of these to Tariq, who also had none beforehand. If Tariq had given half the number he had back to Badri, the number of stamps with Badri would have been 20. How many stamps did Varun give Tariq?​

Answer 1

badri had 32 stamps originally. he gave half of that to varun , ie - 16 who gave half of it to tariq ie - 8 and he gave half of that back to badri ie - 4

so 16+4 - 20.