Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 155 · 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.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
2. 2.🧩 Vihaan is 8 years old. Meera is 7 years older than Vihaan. How old is Meera? (a) 16 (b) 7 (c) not enough info (d) 15
3. 3.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
5. 5.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Vihaan is 11 years old. Aarav is 9 years older than Vihaan. How old is Aarav? (a) not enough info (b) 9 (c) 21 (d) 20
7. 7.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
8. 8.🧩 Rohan is 9 years old. Meera is 2 years older than Rohan. How old is Meera? (a) 2 (b) 11 (c) 12 (d) not enough info
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 7 PM (d) 8 PM
10. 10.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
11. 11.🥭 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
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
15. 15.🧩 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
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
17. 17.🧩 A box has 6 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 48 (b) 56 (c) not enough info (d) 14
18. 18.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Kabir bought 2 balls and a bag for ₹140 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹70 (c) ₹138 (d) ₹140
20. 20.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
21. 21.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
22. 22.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
25. 25.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 30 (b) not enough info (c) 25 (d) 10
26. 26.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Meera is 6 years old. Arjun is 2 years older than Meera. How old is Arjun? (a) 8 (b) 9 (c) not enough info (d) 2
28. 28.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
29. 29.🧩 Kabir is 7 years old. Rohan is 8 years older than Kabir. How old is Rohan? (a) 15 (b) not enough info (c) 8 (d) 16
30. 30.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
32. 32.🧩 Rohan bought 6 balls and a bag for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹210 (b) ₹35 (c) not enough info (d) ₹204
33. 33.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
34. 34.🧩 Kabir bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹75
35. 35.🧩 A box has 3 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 27 (c) 36 (d) 12
36. 36.🧩 Tara is 10 years old. Ishaan is 3 years older than Tara. How old is Ishaan? (a) 13 (b) 14 (c) 3 (d) not enough info
37. 37.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Kabir is 10 years old. Saanvi is 7 years older than Kabir. How old is Saanvi? (a) 7 (b) 17 (c) 18 (d) not enough info
40. 40.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence

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