Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 919 · 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 tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
3. 3.🧩 Aarav is 7 years old. Ishaan is 3 years older than Aarav. How old is Ishaan? (a) not enough info (b) 10 (c) 3 (d) 11
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
5. 5.🧩 Saanvi bought 2 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) ₹15 (b) not enough info (c) ₹30 (d) ₹20
6. 6.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Kabir bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹60 (c) ₹65 (d) not enough info
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
13. 13.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
14. 14.🧩 Meera is 9 years old. Tara is 7 years older than Meera. How old is Tara? (a) 17 (b) 7 (c) not enough info (d) 16
15. 15.🧩 Saanvi is 9 years old. Rohan is 2 years older than Saanvi. How old is Rohan? (a) 12 (b) 2 (c) not enough info (d) 11
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
18. 18.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 15 (d) 20
19. 19.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
20. 20.🧩 Aarav bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹30 (c) ₹25 (d) not enough info
21. 21.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
22. 22.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
23. 23.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 2 PM (c) 5 PM (d) not enough info
24. 24.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
25. 25.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
26. 26.🧩 Kabir is 12 years old. Meera is 2 years older than Kabir. How old is Meera? (a) not enough info (b) 2 (c) 14 (d) 15
27. 27.🧩 Kabir is 9 years old. Diya is 8 years older than Kabir. How old is Diya? (a) 8 (b) 18 (c) 17 (d) not enough info
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
29. 29.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Aarav is 7 years old. Kabir is 6 years older than Aarav. How old is Kabir? (a) 13 (b) not enough info (c) 6 (d) 14
33. 33.🧩 Ishaan bought 2 balls and a lunch box for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) not enough info (c) ₹118 (d) ₹120
34. 34.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
35. 35.🧩 Diya is 12 years old. Vihaan is 9 years older than Diya. How old is Vihaan? (a) 22 (b) not enough info (c) 9 (d) 21
36. 36.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 4 PM
37. 37.🧩 A box has 6 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 15 (b) 63 (c) 54 (d) not enough info
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Meera is 12 years old. Rohan is 5 years older than Meera. How old is Rohan? (a) not enough info (b) 17 (c) 18 (d) 5
40. 40.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM

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