Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 469 · 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: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
3. 3.🧩 Tara is 12 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) 17 (b) 16 (c) 4 (d) not enough info
4. 4.🧩 Rohan bought 2 pens and a cap for ₹160 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹158 (c) ₹160 (d) ₹80
5. 5.🧩 Saanvi is 11 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 12 (b) 13 (c) not enough info (d) 16
6. 6.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
7. 7.🧩 Vihaan bought 6 pens for ₹330 in all. Each pen cost the same. What did one pen cost? (a) ₹330 (b) ₹55 (c) ₹60 (d) not enough info
8. 8.🧩 Ananya bought 3 balls and a water bottle for ₹170 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹56 (c) ₹167 (d) ₹170
9. 9.🧩 Diya is 6 years old. Vihaan is older than Diya. How old is Vihaan? (a) 8 (b) 11 (c) 7 (d) not enough info
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.🧩 Kabir is 6 years old. Aarav is 6 years older than Kabir. How old is Aarav? (a) 6 (b) 12 (c) not enough info (d) 13
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Rohan bought 6 pens for ₹240 in all. Each pen cost the same. What did one pen cost? (a) ₹240 (b) ₹40 (c) ₹45 (d) not enough info
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 A box has 8 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 56 (b) not enough info (c) 63 (d) 15
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Nisha bought 4 pens for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) not enough info (c) ₹20 (d) ₹80
20. 20.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
21. 21.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 36 (b) 32 (c) not enough info (d) 12
22. 22.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) not enough info (c) 8 PM (d) 7 PM
23. 23.🧩 Vihaan is 10 years old. Diya is 8 years older than Vihaan. How old is Diya? (a) 18 (b) 8 (c) not enough info (d) 19
24. 24.🧩 Vihaan is 7 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 9 (b) 12 (c) 8 (d) not enough info
25. 25.🧩 Meera bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹250
26. 26.🧩 Meera bought 6 kites and a cap for ₹350 in all. Each kite cost the same. What did one kite cost? (a) ₹344 (b) not enough info (c) ₹58 (d) ₹350
27. 27.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
28. 28.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
29. 29.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 6 PM (c) not enough info (d) 7 PM
30. 30.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
31. 31.🧩 Diya is 7 years old. Aarav is 4 years older than Diya. How old is Aarav? (a) not enough info (b) 11 (c) 12 (d) 4
32. 32.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
34. 34.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
35. 35.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
36. 36.🧩 A box has 5 rows of apples, with 9 in each row. How many apples are in the box? (a) 54 (b) not enough info (c) 45 (d) 14
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Aarav is 10 years old. Nisha is 2 years older than Aarav. How old is Nisha? (a) 2 (b) 12 (c) 13 (d) not enough info
39. 39.🧩 Meera bought 5 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹75 (c) ₹20 (d) not enough info
40. 40.🧩 Nisha is 8 years old. Tara is 4 years older than Nisha. How old is Tara? (a) 4 (b) not enough info (c) 12 (d) 13

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