challenge

Everyday

1. A challenge is a hard task or contest that tests how good or strong you are. tree →
2. To challenge someone is to invite them to a contest: «I challenge you to a race». tree →
3. To challenge something is to question whether it is right or true. tree →

In the lessons

a contest or a goal in the story, often with a target number; in school, «challenge questions» are harder ones; phrases «take up the challenge», «rise to the challenge», «challenging» (hard), «reading challenge»

Examples

• The reading challenge is 100 books. tree →
• She did 20 push-ups in the challenge. tree →
• How many more to finish the challenge? tree →
• Challenge: find the missing number. tree →
• Learning to swim was a big challenge for him. tree →
• I challenge you to a race to the tree! tree →
• She rose to the challenge and won. tree →
• It's OK to challenge an idea if you have a reason. tree →
• The puzzle was very challenging. tree →
• Online «challenges» that are dangerous should never be tried. tree →
• The giantess was delighted, and challenged him to wrestle with her. tree →

Note

A goal: what is left = goal − done. Trap: «challenge» in a heading is not a quantity. Safety: some online challenges are dangerous dares; say no and tell an adult.