Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 290 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
2. 2.🧩 Diya bought 5 pens and a lunch box for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹265 (b) ₹270 (c) ₹54 (d) not enough info
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
5. 5.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
6. 6.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Ishaan is 7 years old. Nisha is 4 years older than Ishaan. How old is Nisha? (a) 4 (b) 12 (c) 11 (d) not enough info
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Ananya bought 5 balls and a cap for ₹95 in all. Each ball cost the same. What did one ball cost? (a) ₹95 (b) ₹19 (c) not enough info (d) ₹90
12. 12.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 6 PM
13. 13.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
14. 14.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Meera is 9 years old. Ishaan is older than Meera. How old is Ishaan? (a) not enough info (b) 11 (c) 14 (d) 10
16. 16.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
17. 17.🧩 A box has 5 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 9 (c) 20 (d) 24
18. 18.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
19. 19.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 8 (b) 20 (c) not enough info (d) 15
20. 20.🧩 Diya is 6 years old. Meera is 9 years older than Diya. How old is Meera? (a) 15 (b) 9 (c) 16 (d) not enough info
21. 21.🧩 Ananya is 7 years old. Aarav is 3 years older than Ananya. How old is Aarav? (a) 3 (b) not enough info (c) 11 (d) 10
22. 22.🧩 Aarav bought 2 markers and a lunch box for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹68 (b) ₹70 (c) ₹35 (d) not enough info
23. 23.🧩 Meera is 6 years old. Diya is 3 years older than Meera. How old is Diya? (a) 10 (b) 9 (c) not enough info (d) 3
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) 8 PM (d) not enough info
25. 25.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
27. 27.🧩 A box has 6 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 56 (b) 48 (c) not enough info (d) 14
28. 28.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
29. 29.🧩 Meera bought 6 balls and a cap for ₹360 in all. Each ball cost the same. What did one ball cost? (a) ₹360 (b) ₹354 (c) ₹60 (d) not enough info
30. 30.🧩 Meera is 12 years old. Saanvi is older than Meera. How old is Saanvi? (a) 13 (b) 17 (c) not enough info (d) 14
31. 31.🧩 Ishaan bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) ₹45 (c) not enough info (d) ₹50
32. 32.🧩 Nisha is 6 years old. Rohan is 3 years older than Nisha. How old is Rohan? (a) 9 (b) 3 (c) 10 (d) not enough info
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
35. 35.🧩 Rohan bought 3 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) not enough info (c) ₹15 (d) ₹10
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
39. 39.🧩 Diya bought 3 mangoes for ₹135 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) not enough info (c) ₹45 (d) ₹135
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids