Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 634 · 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: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) that one dog barked (d) all dogs are mean
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Aarav is 12 years old. Nisha is 9 years older than Aarav. How old is Nisha? (a) not enough info (b) 21 (c) 9 (d) 22
6. 6.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Nisha bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) ₹25 (c) not enough info (d) ₹30
10. 10.🧩 Rohan bought 5 kites for ₹125 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹125
11. 11.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) not enough info (c) 70 (d) 14
12. 12.🧩 Kabir bought 2 pens and a water bottle for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) not enough info (c) ₹138 (d) ₹70
13. 13.🧩 Ishaan is 8 years old. Diya is 3 years older than Ishaan. How old is Diya? (a) not enough info (b) 3 (c) 11 (d) 12
14. 14.🧩 Diya bought 3 notebooks and a cap for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹75 (c) not enough info (d) ₹72
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
17. 17.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
18. 18.🧩 Ishaan bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) not enough info (c) ₹135 (d) ₹45
19. 19.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
20. 20.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
22. 22.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
23. 23.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
24. 24.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
25. 25.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
26. 26.🧩 Nisha is 8 years old. Arjun is 5 years older than Nisha. How old is Arjun? (a) 14 (b) not enough info (c) 5 (d) 13
27. 27.🧩 Aarav bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹20 (c) ₹25 (d) not enough info
28. 28.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
29. 29.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
30. 30.🧩 A box has 7 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 40 (b) not enough info (c) 35 (d) 12
31. 31.🧩 Meera is 8 years old. Ananya is 4 years older than Meera. How old is Ananya? (a) 13 (b) not enough info (c) 12 (d) 4
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
34. 34.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
35. 35.🧩 Rohan bought 3 pens and a lunch box for ₹65 in all. Each pen cost the same. What did one pen cost? (a) ₹62 (b) not enough info (c) ₹65 (d) ₹21
36. 36.🧩 Aarav bought 5 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹100
37. 37.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
38. 38.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
39. 39.🧩 Ishaan is 7 years old. Kabir is older than Ishaan. How old is Kabir? (a) 8 (b) not enough info (c) 12 (d) 9
40. 40.🧩 Meera bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹30 (c) ₹25 (d) not enough info

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